Is there any software or Internet site that allows simulated trading (using candlesticks) after market hours? I'd like to practice trading in the evenings and/or weekends. Most of the virtual trading programs have to be practiced when the market opens, but that's impossible for me during work hours.

Don't know about the after hours program, but there are many brokers offering simulated platform. Optionsxpress or ThinkorSwim are tow of them, but there may be others. I think MSN also offers a portfolio where you may enter your hypothetical positions.

You can analyze the end of hte day data, and then enter the orders during off hours which can be executed the next day in your simulated portfolio.